BBC: The crisis at Japan's Fukushima nuclear plant "has not ended", the country's nuclear watchdog has warned, saying the situation there is "unstable". Watchdog chief Shunichi Tanaka also accused the plan's operator of careless management during the crisis. He added that it may not be possible to avoid dumping some contaminated water into the ocean. The comments come a day before the Japanese government is due to unveil plans to rescue the clean-up operation. Mr Tanaka's comments come after Fukushima's...